Gas-engine.



CARL EDWARD JOHNSON, OF ST. PAUL, MINNESOTA.

GAS-ENGINE.

Specification of Letters Patent.

Patented May 5, 1914.

. Application filed October 13, 1913. Serial No. 794,900.

To all whom it may concern:

Be it known that I, CARL EDWARD JOHN- son, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Improvement in Gas- Engines, of which the following is a specification.

This invention relates to an internal combustion engine in which an explosion takes place for each stroke of the piston, thereby giving results similar to those obtained with a four cylinder, four cycle, or two cylinder, two cycle type of engine, this result being obtained in my construction with a single cylinder.

Briefly stated the invention consists of a suitable cylinder in which works a hollow piston open at each end and provided intermediate its ends with a solid partition, and a suitable charge receiving reservoir in communication with the cylinder, together with the necessary ports and ignition devices.

In the accompanying drawings: Figure l is a longitudinal section through the cylinder and piston, the piston being shown at the end of the down stroke. Fig. 2 is a transverse section upon the line 2-2 of Fig. 1.. Fig. 3 is a transverse section upon the line 3-3 of Fig. 1.

In these drawings, 1 represents a suitable base upon which rests a ribbed flange 2- of a cylinder 3. Midway its ends the cylinder is enlarged thus providing a suitable water jacket 4 and an explosion chamber 5 concentric with the water jacket 4 and in which works a piston 6. Thepiston proper is of such diameter that it works snugly in the chamber 5 of the cylinder 3, the said piston being hollow and divided intoupper and lower portions by a solid transverse partition 7. Each end of the piston is provided with cylindrical extensions 8 and 9, respectively. the extension '9 being provided with a suitable wrist pin 10 to which is connected the upper end of a piston rod 11. the lower end of which is connected to the crank portion of a shaft 11. The upper portion of the cylinder chamber .12 which is reduced in diameter to fit the upper extension 8 is provided with a suitable circmnferentially extending inlet port 13. said port having communication through a pipe 13 with any suitable form of carbureter not shown. The piston proper adjacent to .and immediately above the partition 7 is provided with a port 14. which during movement of the piston is adapted to be brought into communication with a port 15, which port is in communication through a pipe 16 with a charge receiver 17 carried to one side of the cylinder 3. The arrangement and construction of the port 15 is most clearly shown in Fig. 3. An adjustable partition 18 which I have shown as being adjusted by a threaded rod 19 is arranged in the charge receiver'l7 and by adjusting said partition the capacity of the charge receiver can be regulated. Suitable ignition devices 20 are arranged at the upper and lower ends of the explosion chamber 5. Upon the side of the cylinder opposite the port 15 is an exhaust port 21 extended circumferentially about the cylinder and opening into the same, the opposite sides of said exhaust port being spaced farther apart than the port 15 in order to give proper lead to the exhaust and to insure the clearing of the cylinder of the burnt products of combustion. The port 21 communicates with an exhaust pipe 22.

Assuming that the piston is at the end of its upper stroke upon cranking of the engine, the piston will move downwardly into the position shown in Fig. 1 thus creating a vacuum in the upper portion 12 of the cylinder and a charge of explosive mixture will be drawn through the pipe 13 and through the port 13 into the upper portion of the cylinder and into the upper extension 8 of the piston, which charge will be compressed upon the up stroke, and a portion of this charge will also pass through the ports 1 and 15 into the charge receiver 17,. Upon the second up stroke this charge will be released as the lower head (z of the piston clears the port 15 and it will fill the lower portion of the combustion chamber 5 and upon the next down stroke will be compressed therein and exploded. has on one of the down strokes cleared the port 15 and also drawn a charge from the receiver which on the up stroke is compressed .in the upper portion of the combustion chamber. It will therefore be obvious'that after the engine has been started an explosive mixture will be drawn into the upper extension 8 of the piston at the end of each down stroke and will be delivered upon compression to the receiver. and as an explosion takes place in one end of the combustion chamber a charge to be compressed and'exploded will be delivered into the opposite end 1) tion. There. will therefore he an exp But in the meantime the head I) on each stroke of the piston, said explosions acting alternately upon the heads a and b of the piston.

What I claim is:-

1. In an engine of the kind described, a cylinder, a charge receiver communicating therewith, a hollow piston open at the ends and working in said cylinder, said piston having an impert'orate partition intermediate its ends and having a portadjacent said partition, a piston rod secured in said piston and upon the opposite side of the partition from said port, the said piston having shoulders adapted to alternately clear the point of communication between the cylinder and the charge receiver, the said port registering with said point of communication once during each stroke of the piston, means for admitting an explosive mixture into said cylinder, said mixture passing to the charge re ceiver by way of the port in said piston, means for igniting an explosive mixture upon opposite sides of said piston and means for exhausting the products of combustion.

2. In an engine of the kind described, a cylinder having a central enlarged combustion chamber, a hollow piston Working therein, extensions carried by said piston, said extensions working in the non-enlarged portions of the cylinder, means for feeding an explosive mixture into one end of the cylinder, a crank shaft arranged adjacent the other end, a piston rod connecting said piston to the crank shaft, a'charge receiver having communication with the enlarged portion of the cylinder, the body portion of said piston clearing said point of communication upon each stroke of the piston, an exhaust port common to both ends of the cylinder, and igniting means arranged adjacent opposite ends of the enlarged portion of said cylinder, said piston having a port adapted to communicate once during each stroke with said charge receiver.

alternately to opposite sides of the piston,

means for igniting said mixture alternately at opposite ends of the combustion chamber, an ignition taking place at each end once for each cycle, and an exhaust port common to each end portion of the combustion chamber.

4. In an engine of the kind described, the combination with a cylinder having a combustion chamber, a piston Working therein, a charge receiver in communication with said cylinder, means for supplying an explosive mixture to an end of the cylinder, said mix ture being drawnin during one stroke of the piston and compressed upon the other stroke, said piston being hollow and provided with a port adapted to register once during each stroke with said charge receiver, a solid partition in said piston, the said mixture being fed alternately from the charge receiver to opposite sides of the piston, and means for igniting the explosive mixture alternately upon opposite sides of the piston, one ignition taking place for each stroke of the piston.

CARL EDWARD JOHNSON.

\Vitnesses A. E. MAKEPEAC'E, J ENNIE JoHNsoN. 

